[Chromecast] Add proxy server support to chromecast

chromecast/net/connectivity_checker.h

Index: chromecast/net/connectivity_checker.h
diff --git a/chromecast/net/connectivity_checker.h b/chromecast/net/connectivity_checker.h
index dff6e530c6fd45b10084872b3034582dc61677de..9a61271f7ec0c48c53d771fae2df944b83abe3f9 100644
--- a/chromecast/net/connectivity_checker.h
+++ b/chromecast/net/connectivity_checker.h
@@ -11,10 +11,16 @@
 #include "base/memory/ref_counted.h"
 #include "base/observer_list_threadsafe.h"
 
+class PrefProxyConfigTracker;
+
 namespace base {
 class SingleThreadTaskRunner;
 }
 
+namespace net {
+class ProxyConfigService;
+}
+
 namespace chromecast {
 
 // Checks if internet connectivity is available.
@@ -35,13 +41,16 @@ class ConnectivityChecker
   };
 
   static scoped_refptr<ConnectivityChecker> Create(
-      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
+      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
+      std::unique_ptr<PrefProxyConfigTracker> pref_proxy_config_tracker);
 
   ConnectivityChecker();
 
   void AddConnectivityObserver(ConnectivityObserver* observer);
   void RemoveConnectivityObserver(ConnectivityObserver* observer);
 
+  virtual void DetachFromPrefService() = 0;
+
   // Returns if there is internet connectivity.
   virtual bool Connected() const = 0;